package assignment;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: xiaotutu
 * Date: 2025-02-18
 * Time: 11:14
 */
//使用两个线程来累加 count 的值
//每个线程循环 1w 次，累加变量 count 的值，count 默认值为 0，注意线程安全问题。


class Counter {
    public static int count = 0;

    public void increase() {
       synchronized (this) {
           count++;
       }
    }
}


public class Demo3 {


    public static void main(String[] args) throws InterruptedException {
        Counter counter = new Counter();
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 10000; i++) {
                counter.increase();
            }
        });


        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 10000; i++) {
                counter.increase();
            }
        });

        t1.start();
        t2.start();

        t1.join();
        t2.join();

        System.out.println("count = " + Counter.count);
    }
}
